wg1026688210 commented on a change in pull request #7185: [FLINK-10884]
[yarn/mesos] adjust container memory param to set a safe margin from offheap
memory
URL: https://github.com/apache/flink/pull/7185#discussion_r238663287
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File path:
flink-runtime/src/main/java/org/apache/flink/runtime/clusterframework/ContaineredTaskManagerParameters.java
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@@ -158,8 +158,10 @@ public static ContaineredTaskManagerParameters create(
// (2) split the remaining Java memory between heap and off-heap
final long heapSizeMB =
TaskManagerServices.calculateHeapSizeMB(containerMemoryMB - cutoffMB, config);
- // use the cut-off memory for off-heap (that was its intention)
- final long offHeapSizeMB = containerMemoryMB - heapSizeMB;
+ // (3) try to compute the offHeapMemory from a safe margin
+ final long restMemoryMB = containerMemoryMB - heapSizeMB;
+ final long offHeapCutoffMemory =
calculateOffHeapCutoffMB(config, restMemoryMB);
Review comment:
Thanks for your suggestion. It maybe bring more refactor to the project
if we name the current "containerized.heap-cutoff-ratio" to
"containerized.memory-cutoff-ratio".Because we need to adapt a small memory
container due to 600 mega byte of the current "containerized.heap-cutoff-min".
How about we set a common default value of
"containerized.offheap-cutoff-ratio" and "containerized.offheap-cutoff-min" so
that user do not need to care the two parameters at most condition.
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